Effects of Prismatic Spectacle Lenses on Symptoms of Dizziness, Headache and Anxiety as Caused by Vertical Heterophoria

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The purpose of this study is to demonstrate whether, in patients diagnosed with Vertical Heterophoria, the symptoms of dizziness, headache and / or anxiety are reduced or eliminated when a kind of correction called vertical prism is added to the patient's normal eye glass prescription.

The experiment will involve giving the patient two pairs of glasses (one pair containing the baseline prescription with vertical prism (Standard Treatment Glasses) and the other pair containing the baseline prescription but without vertical prism (Placebo Glasses)) to demonstrate which pair of glasses is most effective in reducing the symptoms of dizziness, headache and / or anxiety in these patients.

Evidence of change / improvement of symptoms of headache, dizziness and anxiety as demonstrated by validated, self-administered survey tools for these symptoms [ Time Frame: Survey tools administered at baseline, 5-7 days after wearing the first pair of glasses, 5-7 days after wearing the second pair of glasses, and when treatment is completed ]

Secondary Outcome Measures
:

Evidence that a new survey tool developed by the authors to assess changes / improvement in dizziness, headache and anxiety associated with Vertical Heterophoria correlates to validated, self-administered survey tools for these same symptoms [ Time Frame: New survey tool to be administered at baseline, 5-7 days after wearing the first pair of glasses, 5-7 days after wearing the second pair of glasses, and when treatment is completed ]

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Ages Eligible for Study:

14 Years and older (Child, Adult, Senior)

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

No

Criteria

Inclusion Criteria:

First time appointment for a patient at designated optometry office for treatment of symptoms associated with Vertical Heterophoria

Must have symptoms of dizziness or headache or both:

Dizziness defined as one or more of these: lightheadedness,dizziness, vertigo, feeling off-balance, lack of coordination / "clumsy", unsteadiness while walking or drifting / veering to one side while walking, motion sickness

Headache defined as one or more of these: pain anywhere in the head,posterior neck / upper trapezius (upper back), face, and in and / or around the eyes